Things keep changing but I noticed three interesting advices or comments:

If you are flying from outside the USA to the US, don’t count on getting any carry-ons onto the plane. I was insisting on limiting the weight of your cabin luggage, but Scott goes further…

Flying domestically in the USA is no guarantee that your carry on will be allowed.

Get a UPS Account. It’s frightening, but it may become the only way to transport photo gear (checked luggage is too easily/often stolen and too harshly handled -even compared to UPS, DHL, Fedex, etc.) and having an account is great for getting better service. And they don’t even charge you for opening an account.

It seems that being a photographer was a pain in the neck in some cities where you were considered as a potential terrorist just for shooting pictures.

Now, the problem will disappear if traveling with your camera gear becomes near to impossible.